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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:01AM | Sunset 7:39PM | Wednesday August 21, 2019 11:27 AM EDT (15:27 UTC) | Moonrise 10:51PM | Moonset 11:39AM | Illumination 65% |  |
ANZ237 Block Island Sound- 952 Am Edt Wed Aug 21 2019
.small craft advisory in effect from 8 pm edt this evening through Thursday morning...
This afternoon..S winds 5 to 10 kt. Seas around 2 ft. A slight chance of showers with isolated tstms. Patchy fog early with vsby 1 to 3 nm.
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers and tstms. Some tstms may produce damaging winds, large hail, and heavy rainfall.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft.
Thu night..SW winds 5 to 10 kt with gusts up to 20 kt, becoming nw after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Fri..N winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. A chance of showers.
Fri night..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt, becoming e. Seas around 2 ft.
Sun..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
.small craft advisory in effect from 8 pm edt this evening through Thursday morning...
This afternoon..S winds 5 to 10 kt. Seas around 2 ft. A slight chance of showers with isolated tstms. Patchy fog early with vsby 1 to 3 nm.
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers and tstms. Some tstms may produce damaging winds, large hail, and heavy rainfall.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft.
Thu night..SW winds 5 to 10 kt with gusts up to 20 kt, becoming nw after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Fri..N winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. A chance of showers.
Fri night..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt, becoming e. Seas around 2 ft.
Sun..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 952 Am Edt Wed Aug 21 2019
Synopsis for massachusetts and rhode island coastal waters.. A warm front will push north across the waters by mid day. This will bring patchy fog as well as showers and scattered Thunderstorms through Thursday. A cold front then sweeps across the waters sometime Thursday night into early Friday morning. Dry weather and good vsby follows for Friday into the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.
Synopsis for massachusetts and rhode island coastal waters.. A warm front will push north across the waters by mid day. This will bring patchy fog as well as showers and scattered Thunderstorms through Thursday. A cold front then sweeps across the waters sometime Thursday night into early Friday morning. Dry weather and good vsby follows for Friday into the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.
7 Day Forecast for Marine Location Near Stonington , CT
Hourly EDIT Helplocation: 41.33, -71.89 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 211423 afdbox area forecast discussion national weather service boston norton ma 1023 am edt Wed aug 21 2019 Synopsis A warm front will push across the region today, bringing scattered showers and thunderstorms along with increasing heat and humidity. A cold front crosses the region on Thursday with another round of scattered showers and thunderstorms, which will linger into early Friday across southern areas as the front slowly pushes offshore. High pressure builds across the northeast, with steady onshore winds bringing cool temperatures into early next week. There may also be a chance for low clouds along with spotty light rain or showers Sunday through Tuesday. Near term until 6 pm this evening 1015 am update... elevated convection assocd with the warm front is lifting north into nh. A second area of showers t-storms moving ene from li and areas along the south coast and CAPE islands will get a few showers and a brief t-storm late morning into early afternoon as this activity moves along the coast. Otherwise, our attention will be focused on upstream convection developing across ny and moving into sne this afternoon. Visible satellite loop indicating lots of breaks developing upstream so expect partial sunshine developing. Warm front across northern ma will lift into nh with warm sector airmass across sne. Dewpoints already into the mid 70s along the south coast and this high dewpoint air will spread northward. This combined with temps reaching the mid 80s will result in capes 1500-2500 j kg which should compensate for marginal mid level lapse rates. Expect increasing coverage of showers t-storms moving into western new eng after 18z as mid level shortwave moves into new eng. Deep layer shear 30-35 kt sufficient for storms to organize into multi-cellular line segments per the hi-res cams, with scattered strong to severe storms expected. Damaging wind and large hail are the primary threat. Increasing 850 mb winds to 30-35 kt this afternoon will lead to low level helicity increasing to 100-150 m2 s2. So a few supercells can't be ruled out and will have to watch for potential rotating storms which could produce an isolated tornado. While all sne is at risk for severe storms, the greatest risk will be across northern ct into interior ma where best updraft helicity is focused. Timing of strongest storms will be 3-9 pm. In addition, pwats pushing 2 inches this afternoon so risk of heavy rainfall may result in areas of urban and poor drainage flooding, especially in areas of thunderstorm training. Short term 6 pm this evening through 6 pm Thursday The shortwave and surface trough eventually move off to the east tonight, but timing should allow for additional evening convection with strong winds downpours. But this should diminish by midnight. Models show no significant chance in airmass, and dew points will be in the upper 60s and low 70s, so expect a humid night with areas of fog and lows in the upper 60s and low 70s. Closed low over james bay sweeps south and pushes a cold front south into new england. After the morning fog burns off, daytime heating will work on 16-18c 850 temps to warm the surface to the mid 80s to around 90. Low level humidity remains in place. Pw values diminish in the morning, but then climb back to near 2 inches in the afternoon. Instability parameters will not be as beefy as today, but will show 500-1000 j kg in the interior and 1000-1500 j kg in ri SE mass. So expect showers and scattered tstms especially in the afternoon. Long term Thursday night through Tuesday Highlights... * scattered showers and a few thunderstorms linger Thursday night as the cold front slowly crosses * showers linger on Friday with cooler temperatures * expect mild temperatures and dry conditions Saturday * cooler than normal temperatures expected Sunday through Tuesday along with spotty light rain or showers at times details... Thursday night... as the cold front crosses the region, will still see areas of showers and a few lingering thunderstorms, mainly near and south of the mass pike. Will see instability decrease as the front pushes slowly through, but may still see some locally heavy downpours as another deep moisture layer moving across. Pwat plume increases to around 2 inches across N ct ri to E mass as an associated short wave slowly crosses near the slowly moving front. Could see some locally heavy downpours once again with this feature. Friday... as the front becomes nearly parallel with the mid level steering flow, could see leftover showers linger along the S coast, cape cod and the islands through around midday before finally pushing offshore. Expect the back edge of the cloud deck to slowly shift southward, pushing offshore late in the day. Light w-nw winds take over, allowing drier air to move in. Expect temperatures to top off in the 70s, with a few spots touching 80, along with decreasing humidity. Saturday through Tuesday... quite a bit of model solution spread amongst the members this morning, with lends to lower confidence on the forecast during this timeframe. Rather confident with the slow but steady movement of the high pressure across northern new england, setting up across maine into eastern quebec and new brunswick late this weekend. This will set up a NE and eventually easterly wind flow by the start of the work week. Could see some gusts up to 20-25 mph across |
cape cod and the islands, possibly into S coastal areas on Sunday. The big question will be whether patchy light rain and or showers could develop from time to time from Sunday to Tuesday. Where these showers and or rain set up is in question, but have kept slight chance pops going for now. At this point, looks like there might be a somewhat better chance for more organized showers Monday into Tuesday, but not a lot of confidence. With the steady onshore flow, expect temps to run around 5 degrees or so below seasonal normals, mainly from Sunday to Tuesday. Highs on Sunday and Monday may not break 70 at some locations along E coastal mass. Aviation 14z Wednesday through Sunday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Thursday ... Moderate confidence. Today... areas of ifr along the south coast will improve to MVFR, otherwise, mainlyVFR CIGS but scattered showers t-storms will be accompanied by brief MVFR ifr and heavy downpours gusty winds this afternoon. The best chance for showers tstms will be in N ct and western central mass this afternoon. Tonight... MVFRVFR with scattered showers tstms especially in the evening. SW winds gusting to 20 kt, especially over CAPE cod and islands. Thursday... vfr MVFR in the morning...VFR in the afternoon with brief MVFR in showers tstms possible. Kbos terminal... Moderate to high uncertainty in timing and coverage of showers tstms. A few showers storms possible late this morning, but best chance will be mid to late afternoon with areas of MVFR-ifr conditions possible. Kbdl terminal... Moderate to high uncertainty in timing and coverage of showers tstms. Should see mainlyVFR conditions through midday. Best chance for showers storms will be from 18z through 00z with areas of MVFR-ifr conditions. Outlook Thursday night through Sunday ... Moderate confidence Thursday night: mainlyVFR, with local MVFR possible. Slight chance shra. Friday through Sunday:VFR. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Thursday ... High confidence. Today... Warm humid air moves back over the waters. South- southwest winds, with some gusts to 20 kt. Expect scattered showers and thunderstorms, with some strong wind gusts and downpours. Vsby 1-3 nm in downpours and patchy fog. Tonight... Showers and thunderstorms diminish after 10 pm. Vsby 1-3 nm in patchy fog. Persistent south to southwest winds will build waves to 5-6 feet, so we have issued a small craft advisory for some of the southern waters. Thursday... Winds continue from the southwest much of the day, ahead of an approaching cold front. Expect another round of showers and scattered thunderstorms. Winds will remain less than 25 kt while seas will be around 5 feet on parts of the southern waters. Outlook Thursday night through Sunday ... Moderate confidence. Thursday night: winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers, chance of thunderstorms. Friday through Friday night: winds less than 25 kt. Areas of seas approaching 5 ft. Saturday: winds less than 25 kt. Seas locally approaching 5 ft. Saturday night: winds less than 25 kt. Sunday: winds less than 25 kt. Areas of seas approaching 5 ft. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... Small craft advisory from 8 pm this evening to 8 pm edt Thursday for anz254>256. Small craft advisory from 8 pm this evening to 11 am edt Thursday for anz235-237. Synopsis... Wtb evt near term... Kjc short term... Wtb long term... Evt aviation... Wtb kjc evt marine... Wtb evt |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for New London, CT
(wind in knots) EDIT (on/off) Help| 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | |
| Last 24hr | NW G6 | N | NW G5 | W G7 | SW | SW G11 | SW G9 | SW G8 | SW | SW | S | S | S | -- | -- | -- | -- | -- | NE | -- | NE | -- | NE | S |
| 1 day ago | S | S | S G12 | S G11 | S | S | S | SW G12 | SW | NW | -- | S | S | S | S | W | W | -- | NW | NW | N | N | -- | N G7 |
| 2 days ago | S | SW G6 | S G12 | S G9 | S G11 | S | S | S G8 | S G9 | S | S | SW | S | S | S | SW G9 | SW | -- | N | N | S | S | SE | S |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Westerly, Westerly State Airport, RI | 5 mi | 35 min | SSE 8 | 2.50 mi | Fog/Mist | 78°F | 77°F | 97% | 1015 hPa |
| Groton / New London, Groton / New London Airport, CT | 8 mi | 92 min | ESE 5 | 0.25 mi | Fog | 77°F | 73°F | 88% | 1015.2 hPa |
| Montauk, Montauk Airport, NY | 17 mi | 34 min | SSW 5 | mi | 78°F | 73°F | 85% | 1014.8 hPa | |
| Block Island State Airport, RI | 19 mi | 92 min | S 9 | 7.00 mi | Thunderstorm in Vicinity | 0°F | 0°F | % | 1015.6 hPa |
Link to 5 minute data for KWST
Wind History from WST (wind in knots)
| 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | |
| Last 24hr | N | Calm | W | SW | SW | SW | SW | Calm | Calm | Calm | Calm | N | Calm | Calm | S | |||||||||
| 1 day ago | S | S | S | S | S G17 | SW | SW | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | ||||||||
| 2 days ago | W | SW | S | S | S | S | S | S | S | SW | SW | SW | S | SW | SW | Calm | S | Calm | W | SW |
Tide / Current Tables for Stonington, Fishers Island Sound, Connecticut
EDIT Weekend mode (on/off) (on/off) Help One Week of DataStonington
Click for Map
Wed -- 01:05 AM EDT 2.67 feet High Tide
Wed -- 06:02 AM EDT Sunrise
Wed -- 07:42 AM EDT 0.67 feet Low Tide
Wed -- 11:39 AM EDT Moonset
Wed -- 01:35 PM EDT 2.93 feet High Tide
Wed -- 07:38 PM EDT Sunset
Wed -- 08:22 PM EDT 0.74 feet Low Tide
Wed -- 10:50 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:05 AM EDT 2.67 feet High Tide
Wed -- 06:02 AM EDT Sunrise
Wed -- 07:42 AM EDT 0.67 feet Low Tide
Wed -- 11:39 AM EDT Moonset
Wed -- 01:35 PM EDT 2.93 feet High Tide
Wed -- 07:38 PM EDT Sunset
Wed -- 08:22 PM EDT 0.74 feet Low Tide
Wed -- 10:50 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 2.5 | 2.7 | 2.6 | 2.2 | 1.7 | 1.3 | 1 | 0.8 | 0.7 | 1 | 1.6 | 2.2 | 2.7 | 2.9 | 2.9 | 2.6 | 2.2 | 1.7 | 1.3 | 1 | 0.8 | 0.8 | 1.2 | 1.8 |
Tide / Current Tables for The Race, Long Island Sound, New York Current
EDIT (on/off) Help One Week of DataThe Race
Click for Map
Wed -- 12:33 AM EDT 2.25 knots Max Flood
Wed -- 03:39 AM EDT -0.00 knots Slack
Wed -- 06:03 AM EDT Sunrise
Wed -- 06:53 AM EDT -2.48 knots Max Ebb
Wed -- 09:53 AM EDT 0.00 knots Slack
Wed -- 11:40 AM EDT Moonset
Wed -- 12:54 PM EDT 2.38 knots Max Flood
Wed -- 04:04 PM EDT -0.00 knots Slack
Wed -- 07:21 PM EDT -2.56 knots Max Ebb
Wed -- 07:38 PM EDT Sunset
Wed -- 10:31 PM EDT 0.00 knots Slack
Wed -- 10:51 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:33 AM EDT 2.25 knots Max Flood
Wed -- 03:39 AM EDT -0.00 knots Slack
Wed -- 06:03 AM EDT Sunrise
Wed -- 06:53 AM EDT -2.48 knots Max Ebb
Wed -- 09:53 AM EDT 0.00 knots Slack
Wed -- 11:40 AM EDT Moonset
Wed -- 12:54 PM EDT 2.38 knots Max Flood
Wed -- 04:04 PM EDT -0.00 knots Slack
Wed -- 07:21 PM EDT -2.56 knots Max Ebb
Wed -- 07:38 PM EDT Sunset
Wed -- 10:31 PM EDT 0.00 knots Slack
Wed -- 10:51 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 2.1 | 2.2 | 1.6 | 0.6 | -0.4 | -1.4 | -2.2 | -2.5 | -2 | -1 | 0.1 | 1.2 | 2.1 | 2.4 | 1.9 | 1.1 | 0.1 | -1 | -2 | -2.5 | -2.4 | -1.6 | -0.6 | 0.5 |
Weather Map and Satellite Images
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GOES Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Boston, MA (11,2,3,4)
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Ground Weather Radar Station Boston, MA
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Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program. |